Malicious PDF — malware analysis report

Static analysis result for SHA-256 de88634ccb1e5fba…

MALICIOUS

PDF

33.0 KB Authoring application: ImageMagick
MD5: 2cb6754ccc62c59b3c58755359a2a723 SHA-1: 3d094aee022d2eca23bc08c4aba127d980ba9f55 SHA-256: de88634ccb1e5fbac2d538b652e20e76c6b87837f0c4039fc945cf9699c47197
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as phishing or a traffic redirection mechanism. The primary attack pattern involves directing users to a vast network of external PDF files hosted across numerous domains.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.cellnutritionandfitness.com/uploads/1/3/0/5/130588843/1bffd7.pdf
    • http://hypnotherapymusic.net/uploads/1/3/0/4/130483682/boxenozo.pdf
    • http://www.fr8consult.co.nz/uploads/1/3/0/4/130488067/7654b19ba119.pdf
    • http://chooseyourfamilyadventures.com/uploads/1/3/0/4/130488743/xisazuvalila-motenovupumogu-sikeje.pdf
    • http://blueoxorganics.com/uploads/1/3/0/7/130740183/1905554.pdf
    • http://satellitesessionsmusic.com.au/uploads/1/3/0/7/130776131/1269169.pdf
    • http://www.agatsusudbury.com/uploads/1/3/0/4/130476101/2479967.pdf
    • http://salestrainingcourse.org/uploads/1/3/0/4/130491513/pulipofezuneso_sixiwo.pdf
    • http://funtiff.com/uploads/1/3/0/6/130620607/1238160ab6d.pdf
    • http://meliciosa.com/uploads/1/3/0/6/130620951/919673.pdf
    • http://adentaaustralia.com/uploads/1/3/0/6/130621128/522ff7d638c.pdf
    • http://domainesentiersfrontaliers.com/uploads/1/3/0/5/130588695/0d044f.pdf
    • http://desktopacademy.com/uploads/1/3/0/5/130551962/nulil.pdf
    • http://woulibayiti.com/uploads/1/3/0/4/130476332/130476332.html#concentricity+gd
    • http://www.agatsusudbury.com/uploads/1/3/0/4/130476101/2

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002a1c.bin
e32bc45c5b58d785dcf99f3b33a88d587d54f48ed70adafd6987e589991948d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A1C 7232 bytes

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